Saw operating mechanism



INVENTOR.

April 15, 1952 w. E. ROE

SAW OPERATING MECHANISM 2 SHEETS--SHEET 1 Filed March 29, 1949 2SHEETS--SHEET 2 OF .\\\\\\K\ M M T. 9 31 J m3 w WN K W p m n 4 .6 a 5 1m n i- W .l E PF Y B April 15, 1952 w. E. ROE

SAW OPERATING MECHANISM Filed March 29, 1949 receiving bolts 11.

Patented Apr. 15, 1952 UNITED STATES PATENT OFFICE 9 Claims.

This invention relates to certain new and use- .ful improvements in sawoperating mechanism particularly constructed and designed to saw rails.of a railroad or car track, in or out of track.

A primary object of the invention is to provide a new and improvedconstruction for supporting the saw frame in a horizontal relationshipat all times with the rail during the sawing operation and for elevatingand holding in a fixed plane the saw blade from the work on the returnstroke of the saw frame carrying the saw blade.

Another and equally important object of the invention is to provide agravity-held saw operating mechanism which can be readily andconveniently clamped over the head of the rail and be firmly held insuch.position during the sawing operation.

Another object of the invention is to provide a saw operatingmechanismwhich can be operated with the minimum degree of effort and one whichcan be manufactured at an economical cost.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of partsto be hereinafter erence to the accompanying drawing showing thepreferred form of construction, and in which:

Fig. 1 is a side elevational view of the invention showing the same inits relationship to one railof a train track or car track;

Fig. 2 is a top plan view of the same;

Fig. 3 is a fragmentary sectional detail view taken substantiallyon line3-:'3,0f Fig. 1;

Fig. i is a fragmentary sectional .detail view taken substantially. online 4-4 of Fig. 3;

Fig. 5 is a fragmentary sectional detail view taken substantially online 55 of Fig. 4;

Fig. 6 is a fragmentary sectional detail view taken substantially online 6-6 of Fig. 1.

The several objects of my invention are best accomplished by thepreferred form of construction illustrated in the accompanying drawings,in which drawings a base plate is indicated. at [0.

This, base plate Ill is secured bywelding or the like to base flanges H.These flanges H are formed as integral parts of brackets l2 and It. Thebrackets. I2 and [3 each define at their upper end portion a roundedextension I4. These extensions Ill project between confronting lugs I5formed as an integral part of the carriage arms it. These carriage armsl6 are pivotally connected to the brackets l2 by means of nut The upperend portion of these carriage arms I6 is pivotally connected as at IBtoa carriage bar l9. To one end of this carriage bar I9 is connected as at20 a handle 2| for reasons hereinafter to become apparent. This carriagebar [9 is substantially square in cross section and is provided in itsfour surfaces with longitudinally-extending grooves 2|.

A saw blade carriage comprises a frame 22. This frame. 22 comprises anouter or forward depending arm 23 in spaced parallel alignment withrespect to an inner orrearward arm 24. The arms 23 and 24 are integrallyconnected together by a connecting bar 25.

'Ihisframe 22 provide at its upper edge portion spaced bearing blocks25. slidably projected through these bearing b1ocks26is the carriage barI9. These bearing blocks 26 have associated therewith anti-frictionelements 21 in the form of ball bearings engaging in the grooves 2|.Certain of these ball bearings are maintained in place by retainingbolts 28,"Fig. 1.

The lower end portion of the arm. 23 has formed therein a horizontalopening 29 into which is slidably mounted a stud shaft 30. One endportion of this stud shaft 30 carries a pin 3|. The opposite end portionof the stud shaft is provided with threads 32 and threaded upon thisthreaded end portion of the shaft 30 is a retaining nut 33.

The arm 24 has formed therein a socket 34 and fixed in this socket inany suitable manner, as by means of a pin 35, is a depending stud shaft35 having a flattened surface 31 fromwhich projects a pin 38. A sawblade 39 of axstandard construction is connected to the frame 22.byengagement with the pins 3| and 38 in'a conventional and well-knownmanner.

By adjusting the tightening or retaining nut 33, the tension of the sawblade 39 may bevaried.

The depending arm 24 provides an extension 40 which is adapted to haveconfronting engagement with the end portion 4! of a connecting link 42.This extension 40 is pivotally connected to the link 42 by means of anut. and bolt assembly 43. The opposite end portion 44 of this link vt2has connection with a slidable-blockAB by means of a nut and boltassembly 46. The opposite end portion id of the link 42 is. keyed to thebolt 45 by means of a key 41. Mounted on this bolt 46 and keyed theretoby means of the key 41 is a disc 48 bearing cam teeth 49. This disc 48,being keyedto the bolt 45, is movable with the link 42.

The block 45 is mounted for slidable movement in a horizontal plane uponp-arallelly extending bolt 62 carried by the extension 59'. 6| operatesin an opening 62' formed in the extension 56 and is normally held eitheragainst spaced rods 59. Corresponding end portions of these rods arefixed to the bracket I3 in any approved. manner such as, for example, bymeans of retaining pins 52.

The opposite corresponding end portions 53 of these rods are fixedlysecured to a center bracket 54 by means of any approved construction, asby means of pins 55. This center bracket is secured to the base plateIii by welding or the like.

The block 45 provides lateral extensions 56 and 56' in which the rods 5|are mounted to permit slidable movement of the block 45 relative tothese rods. The lower extensions 56 which are arranged in spacedrelation with respect to each other, are provided with aligned openings51 substantially square in cross section. A lifting bar 58 likewisesubstantially square in cross section is slid'a-bly arranged in theseopenings 57.

This lifting bar 53 provides an elevating tooth 59, which is adapted toengage an adjacent tooth 49 of the disc. This lifting bar 58 provides atone end portion a notch 59 and adapted to engage in this notch 69 is alatch head 6| of a slidable This head the'lifting bar 58 orin the notch59 by an expansion spring 53. This expansion spring is maintained in theopening 62' upon the bolt 52 by means of a retaining plate 64 secured asat I 65 to the extension 55'. The bolt 62 extends through an opening 66formed in a releasing plate 61. Threaded upon the exterior end portionof I this bolt 62 is a retaining nut 63 between which nut and thereleasing plate 61 is arranged a washer 69.

'The opening 69 in the releasing plate 57 is larger in diameter than thediameter of the bolt 62, to permit pivotal movement of this releasingThe intermediate bracket 54 carries a pin II having a conically taperedend portion 12. This pin 'II- is disposed in alignment with respect tothe space I3 (Fig. 5) between the releasing plate 51 and the adjacentextension 56.

When the latch head 6| is disengaged from .the'notch' B9 in a manner tobe presently explained, the end portion I4 of the lifting bar 58normally extends beyond the adjacent extension 56' to a positionindicated in dotted lines A (Fig. 4) and as shown in Fig. 1. V

The brackets I2 and I3 and the bracket 54 each provide a laterallyextending supporting arm 15. Secured to these arms I5 and fixed theretoby means of bolts I6 is a tie plate 11, for the purpose of tyingbrackets I2,

,jgether to give rigidity.

I3, and 54 to- The bracket I2 on one side thereof provides a I lateralframe I8, the vertical wall I9 thereof being provided with an elongatedslot 80. Adjustably secured to this frame I9 by means of bolts 8| whichare mounted in the slot 89, is a clamping jaw 82. This clamping jaw 82is provided with spaced aligned openings 83 for the projectiontherethrough of guide rods 84.

Between these openings 83 is a tappedopening 85 into which is threadedan adjusting bolt 85.

The outer corresponding end portions of th guide rods 84 are fixed insockets 81 of a complementary clamping jaw 88. The threaded shank 86 hasan enlarged portion 89,.and carried by this portion 89 is a handle 90 bywhich the threaded shank 86 may be rotated to adjust the clamping jaws82 and 98 relative to each other and for clamping these jaws upon thehead 9| of a rail 92 to be sawed. I

The enlarged portion 89 is provided with a circular groove 92 andengaging in this groove 92' is a pin 93 which restrains the movement ofthe jaw relative to the enlarged portion 89, while permitting rotationof this portion relative thereto.

The tie plate "I? is preferably channel-shaped in cross section forstrengthening purposes.

The saw blade 39 bears upon thehead 9| of the rail 92 by virtue of theweight of the car riage frame 22 and in this respect the saw blade isgravity fed.

Pivotally connected as at 94 is a handle socket 95, mounted in thetapered socket 96 of which is a handle 9?. This handle socket ispivotally connected to the block 45 by means of a connecting link 98carried by the bolt assembly 46 and connected to the handle socket by abolt 99.

In operation the device is positioned with respect to the rail 92 in themanner shown in Fig. 2, with the rail head 9| firmly clamped between thejaws 82 and 88.

The sawing takes effect 'upon the back stroke. When the frame is in itsextreme rear position, such as shown in Fig. 1, the end portion I4 ofthe lifting bar 58 will strike the bracket I3. This engagement of thelifting bar 58 with the bracket I3 will move the bar 58 relative totheblock 45 and, in so doing, the tooth 59 of the lifting bar will engagethe adjacent tooth 49 of the disc 49 and rotate that disc 48 in ananticlockwise direction. This disc 48 being keyed to the bolt 46 and thebolt 46 being keyed to the connecting link 42, will rotate theconnecting link in an anticlockwise direction. As this link 42 isfixedly secured to the carriage frame 22, this ro tation of the link 42in anticlockwise direction will elevate the carriage frame 22 todisengage the saw blade 39 from the rail head 9| durin the forwardmovement of the carriage frame 22, which forward movement is broughtabout by pivoting the socket handle 95 in a forward direction.

The forward movement of the lifting bar 58 by engagement withthe bracketI3 will move the notch 69 in a position to receivethe latch head 6| soas to latch this lifting bar to the block 45 during this liftingoperation of the frame 22.

When the frame 22 has reached its extreme forward position, the pin IIwill engage between the release bar Gland the adjacent projection orextension 55 whereby to disengage the latch head 6| from the notchGIl,whereupon the lifting bar 58 will, by reason of the weight of the frameon the link 42, be pivoted to its rearmost position as the saw blade 39moves by gravity upon the rail head 9| and serves to saw the rail duringthe back stroke of the frame 22. In this manner the blade 39 in theforwardrstroke of the frame is elevated from engagement with the railhead 9| and is automatically dropped into sawing operation atthebeginning of theback stroke of the frame 22.

By actuating the handle 91in a backward and r 8 forward motion; theoperator may with iease re ciprocate tlie'saw-rrame relative to thecarriage bar. [9 toy-permrm the sawing-operation. When itis desirable toremcvethe device from the rail to permit the passage of a train or forany other-reason, the operator by manipulation of'the handle 91 in afullbackward direction causing the lifting bar 58 to become locked toblock45'byymeans oflatch head Biengaging notch 60, which holds "frame 22in a fixed vertical plane, and then, by graspingthe handle 2!,

"and exerting pressure backwards, he may pivot the saw blade 39 to itsextreme vertical position and'ou't of engagement with the rail head 9|for quick removal of the device fro'men age ment with the rail, afterturning clamp handle counterclockwise to'releas'eclamp 81 from rail head9|, allowing device to be removed.

The present invention constitutes an improvement over that shown'anddescribed in United -States Letters Patent No. 1,900,304.

While I have illustrated and described the preferred form ofconstruction for carrying my invention into'effect, this is capable ofvariation and modification without departing from the sp'iritof theinvention. 1, therefore, do not wish to be limited to the precisedetails of construction'set forth, but desire to avail myself of suchvariations and modificati'onsas come within the scope of the appendedclaims.

Having thus described my invention, what I claim as new and desire toprotect by Letters Patent is: p

1. A rail saw comprising a base plate, spaced supporting'brackets onsaid plate, a carriage bar extendingkabove and in parallel relation onall planes within the scope of vertical travel with respect to, saidbase plate, linkccnnections between said brackets and said carriage barwhere bysaid carriage bar may be moved relative to said baseiplate, acarriage frame, means providing" slidable connection between thecarriage frame and-the carriage bar; a saw blad'ecarried by said framaanintermediate bracket carriedjby said base plate in parallel spacedrelation with 'respect'tosaid first-named brackets, a bearing block,guiderods carried between the intermediate bracket and one of saidfirst-named brackets and having operative slidable connection with saidbearing block, a link connection between said bearing block and saidcarriage frame; a handle bearing socket pivotallyconnected to saidone'of said brackets, a link connection between said handle and saidbearing block for reciprocating saidcbe'aring blcck relative to saidguide rods and said frame relative to said carriage bar.

2. A rail-saw comprising a base plate, spaced supporting brackets onsaid plate, a carriage bar extendingflabove and in parallel relation onall planes within its scope of vertical travel with respect tc said baseplate, link connections between said brackets and said carriage barwhereby said cari iagebarmaybe moved relative to said base plate, acarriage frame, means providing a slidableiconnection between thecarriage frame for latching said carriage bar and said "frame in of 1said brackets, a link cohnectien-betwcen said handle and saidbearingblock for reciprccatlng said bearing block relative to said guide rodsand said frame relative to said carr iage bar, and means for clamping-1yconnecting sai'd'rbase plate to the head of a track rail.

3. A rail saw comprising a base plate, spaced supporting bracketson'said plate, a carriagebar extending above and in parallel relation onall plane's within its scope of vertical travel with respect to saidbase plate, link connections between said brackets and said carriage barwhereby said carriage bar maybe movedrelative to said base plate, acarriage'framepmeans providing slidable connection betweenthe carriageframe and the carriage bar, a saw blade carried by said frame, anintermediate 'bracket carried by said base plate in parallel spacedrelation with respect to said first-named brackets, a-b'earing block,guide rods carried between the-intermediate bracket and one of saidfirst-named br'ackets and having operative slidable connection with saidbearing block, a link connection between'said bearing block and saidcarriage frame, a handle bearing socket pivotally connected to said oneof said brackets, a link connection between said handle and said bearingblock for reciprocating said bearing block relative to said guide rodsand said frame relative to said carriage bar-,means for elevating saidcarriage bar and said; frame at the completion of the back stroke ofsaid bearing block, meansfor latching said carriage barand said frame insaid elevated position during the forward stroke of said bearingblockwith respect to said guide rods, and means for releasing saidlatching means to permi't said frame and said carriage bar to: depositsaid blade upon the head of a track rail. i

4. A rail saw comprising a base plate-spaced supporting brackets on saidplate, a c'arriage bar extending above and in parallelrelation on allplanes within its scope of vertical travel with respectto said baseplate, link connections betweensaid brackets andsaid carriagebar'whereby said carriagebar may be moved relative to said base plate, acarriage frame, means providing slidable connection between the carriageframe and the carriage bar, a saw bladecarried by said frame, anintermediate bracket carried by said base plate in parallel spacedrelation with respect to said'first-named brackets, a bearing block,guide rods carried between the intermediate bracket and one of saidfirst-named brackets and having operative slidable connection with saidbearing block,a link connection between said bearing block and saidcarriage frame,-a handle bearing socket pivotally connected to said onecarriage bar and said frame at the completion of the back stroke ofsaidbearing block, means said elevated position during the forwardstroke 'of said bearing block with respect to "said guide said bracketsand said carriage bar vwhereby said carriage bar may be moved relativeto said base plate, a carriage frame, means providing slidableconnection between the carriage frame and the carriage bar, a saw bladecarried by said frame, an intermediate bracket carried by said baseplate in parallel spaced relation with respect to said first-namedbrackets, a bearing, block, guide rods carried between the intermediatebracket and one of said first-named brackets and having operativeslidable connection with said bearing block, a link connection betweensaid bearing block and said carriage frame, a-handle bearing socketpivotally connected to said one of said brackets. a link connectionbetween said handle and said bearing block for reciprocating saidbearing block relative to said guide rods and said frame relative tosaid carriage bar, and a channel plate carried by said brackets inlongitudinal spaced relation with respect to'and above said base plate.

6. A rail saw comprising a base plate, spaced supporting brackets onsaid plate, a carriage bar "extending above and in parallel relation onall planes within its scope of vertical, travel with respect to saidbase plate, link connections between said brackets and said carriage barwhereby said carriage bar may be moved relative to said base plate, acarriage frame, means providing slidable connection between the carriageframe and the carriage bar, a saw blade carried by said frame, anintermediate bracket carried by said base plate in parallelspacedjrelation with respect to said first-named brackets, a bearingblock, guide rods carried between the intermedia te bracket and one ofsaid first-named brackets and having operative slidable connection withsaid bearing block, a link connection between said bearing block andsaid carriage frame, a handle bearing socket pivotally connected to saidone of said brackets, a link connection between said handle and saidbearing block for reciprocating said bearing block relative to saidguide rods and said frame relative to said carriage bar, means forclampingly connecting said base plate to the head of a track rail, and achannel plate carried by said brackets in longitudinal spaced relationwith respect to and above said base plate.

'7. A rail saw comprising a base plate, spaced supporting brackets onsaid plate, a carriage bar extending above and in parallel relation onall planes within its scope of Vertical'travel with respect tosaid baseplate, link "connections between said brackets and said carriage barwherebyaid carriage bar may be moved relative to said base plate, acarriage frame, means providat e bracket and one of said first-namedbrackets and having operative slidable connection with saidhbearingblock, a link connection between said bearing block and said carriageframe, a handle bearing socket pivotally connected to said one of saidbrackets, a link connection between said handle and said bearing blockfor reciproeating said bearing block relative to said guide rods andsaid frame relative to said carriage bar, means for elevating saidcarriage bar and said frame at the completion of the back stroke of saidbearing block, means for latching said carriage bar and said frame insaid elevated position during the forward stroke of said bearing blockwith respect to said guide rods, means for releasing said latching meanstopermit said frame and said carriage bar to deposit said blade upon thehead of a track rail, and a channel plate carried by-said brackets inlongitudinal spaced relation with respect to and above said base plate.

8. For a combination comprising a pair of supporting brackets, guiderods carried by and extending between said brackets, a bearing blockslidably mounted on said guide rods, a saw carriage frame pivotallysupported from said hearing block, means for elevating said carriageframe when said block reaches the end of its slidable movement in onedirection with respect to said guide rods, means for latching saidcarriage frame when said block reaches the end of its slidable movementin one direction with respect, to said guide rods, means for latchingsaid carriage frame in said elevated position during movement of thebearing block in an opposite direction with respect to said guide rods,and means for disengaging said latching means when said block reachesthe end of its slidable move"- ment in said opposite direction to permitsaid saw carriage frame to move by gravity to dispose a saw bladecarried thereby upon the head of a track rail.

9. For a combination comprising a pair of supporting brackets, guiderods carried'by and extending betweensaid brackets, a bearing blockslidably mounted on said guide rods, a saw carriageframe pivotallysupported from said hearing block, means for elevating said carriageframe when said block reaches the end of its slidable movement in onedirection with respect'jto said guide rods, means for latching said.carriage frame when said block reaches the end of its slidable movementin one direction with respect to said guide rods, means for latchingsaid carriage frame in said elevated position during movement of thebearing block in an opposite direction with respectto said guide rods,means for disengaging said latching means when said block reaches theend of its slidable movement in said opposite direction to permit saidsaw carriage frame to move by gravity to dispose a saw blade carriedthereby upon the head of a track rail, and means for clampinglypositioning said saw carriage frame with respect to said rail.

" WILLIS E. ROE.

REFERENCES CITED The following references are of record in the file ofthis patent: l

UNITED STATES PATENTS Number Name c 3 Date 1,468,514 Roe Sept. 18,11,9231,306,951 I Price May 26,1931 1,900,304 Roe Mar. 7, 1933 1,919,323 BlumJuly 25, 1933

